// Copyright (C) 2015 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.from
description: Creating object with custom constructor (traversed via iterator)
info: |
    [...]
    6. If usingIterator is not undefined, then
       a. If IsConstructor(C) is true, then
          i. Let A be Construct(C).
       b. Else,
          i. Let A be ArrayCreate(0).
       c. ReturnIfAbrupt(A).
features: [Symbol.iterator]
---*/

function Test() {
    var thisVal, args;
    var callCount = 0;
    var C = function() {
      thisVal = this;
      args = arguments;
      callCount += 1;
    };
    var result;
    var items = {};
    items[Symbol.iterator] = function() {
      return {
        next: function() {
          return {
            done: true
          };
        }
      };
    };

    result = Array.from.call(C, items);

    assert(
      result instanceof C, 'The result of evaluating (result instanceof C) is expected to be true'
    );
    assert.sameValue(
      result.constructor,
      C,
      'The value of result.constructor is expected to equal the value of C'
    );
    assert.sameValue(callCount, 1, 'The value of callCount is expected to be 1');
    assert.sameValue(thisVal, result, 'The value of thisVal is expected to equal the value of result');
    assert.sameValue(args.length, 0, 'The value of args.length is expected to be 0');
}

// preheat
const NUMBER_OF_PREHEAT = 1;
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}

ArkTools.jitCompileAsync(Test);
assert.sameValue(ArkTools.waitJitCompileFinish(Test), true, '[JIT] JIT disabled.');

// test
const NUMBER_OF_TEST = 1; // or 2
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}
